Rolls for rolling girder-rails



(No Model.) 3 Sheets-Slieet 1.

A. J. MOXHAM.

ROLLS FOR ROLLING GIRDER RAILS. I No. 333,475. Patented Dec. 29, 1885.

(No Model.) 3 SheetsSheet 2.

A. J. MOXHAM.

ROLLS FOR ROLLING GIRDRR RAILS. No. 333,475. Patented Dem-Z9, 1885.

(No Model.) A. MOXHAM. 3 Sheets-Sheet 3.

ROLLS FOR ROLLING GIRDER RAILS. N 333,475, Patented Dec. 29, 1885.

N4 PETERS, Phulo-Lifl'mgmpher. Washingmn, n C.

U I T P TENT. Grates.

ARTHUR'J. MOXHAM, or JOHNSTOWN, PENNSYLVANIA.

ROLLS. FOR ROLLING GlRDER-RAILS.

SPECIFICATION forming part of Letters Patent No. 333,475, dated December29,1sas.

Application filed November 3, 1885. Serial No. 181,746. (No model.)

To aZZ whom, it may concern:

Be it known that I, ARTHUR J. MoxHAM, of Johnstown, in the county ofOambria and State of Pennsylvania, have invented a new and usefulImprovement in Rolls for Rolling Girder-Rails, which improvement orinvention is fully set forth and illustrated in the followingspecification and accompanying drawings. The object of this invention isto roll, in rolling-mill rolls, a girder-rail devoid of lower flanges,but provided with a beveled-footed web; and the invention consists ofcertain rolls provided with specially-formed passes for such purpose.

In the accompanying drawings, Figure 1 shows, in front elevation, a pairof roughingrolls three-high. Fig. 2 shows, in like elevation, a secondpair of roughing-rolls three high. Fig. 8shows, in similar elevation,apair of finishing-rolls, also three-high.

The first of said figures contains five passesone dummy or flatteningpass (N0. 4) and four edging-passes. The second contains threepasses-two edging and one dummy pass, N o. 6.) The third contains sixpasses all edging-passes-1nal ing a total number of fourteen passes. Ahot bloom, having a crosssection about like the space included withinthe dotted lines at pass No. 1, being entered into said pass and rolledtherethrough, is next run on edge into and through pass No. 2, thence onedge into and through pass No. 3, thence on the fiat through thedummy-pass No.4, thence on edge through No. 5, thence on the flatthrough the dummy-pass No. 6, thence on edge through No. 7, and thence,successively, on edge through all the remaining passes, ending with No.14.'

In passes Nos. 1 and 2 more work is done on one side of the metal thanon the other, because while the bloom is heavy or of large body itisless susceptible to variation in work than in thelater passes, whennearer to finished shape.

In pass No. 3 excess of work is put on the upper part of the web A A andmuch less on the extreme end B B of the same, the object being to havean ample body of metal at the extreme end to form the wedge or beveledlower part of the web in the finished rail. It is of advantage to thuslocalize the greatest distortion that would otherwise ensue.

Pass No. 4, being a dummy-pass, widens out the whole head part of themetal and reduces its thickness, by which spreading enough width issecured to put sufficient draft on the points 0 c, in the next (edging)pass, No. 5, to correspond with a quick reduction at D D of the webportion. The reduction at D D is facilitated by leaving room enough forthe flow of metal sidewise to the point E, under which action the webpart is subjected to elongation as well as displacement.

In passes Nos. 6 and 7 the same operations and principles are carriedout as in passes Nos. 4 and 5.

In passes Nos. 7 and 8 the reduction and partial formation of the lowerwedge or beveled foot are simultaneously eii'ected by putting excess ofwork upon the center of the web at F F in pass No. 7 and at G G in passNo. 8, While again providing freedom for flow of metal at the points Hand H.

In passes Nos. 9 to 12 the heaviest draft is on the two extremes of thehead, together with side draft on the head, including with the headproper the side tram also. The distribution of draft on the web is suchthat it is lighter on the central portion and on the beveled end andheavier at the shoulders, where it adjoins the head.

It is found in rolling all rails without lower flanges that greattrouble is incurred in securing a flow of metal in the head part to keepup with that of the metal in the web part. It is frequently the casethat the tendency of the Web to run away from the head is evidenced bycorrugations in the web. As the metal is rigidly held at the head part,any excess of flow in the metal of the web part can only find its pathin such corrugations. This tendency to corrugation is obviated byshaping the passes so as to cause the distribution of work and draftabove described-that is, there is induced or caused a flow of metal atthe point oljunction of head and web. (by heavy draft,)

while such flow at the other extreme end is checked by providing fordisplacement of metal there, and at the same time causing the reductionsin the earlier passes, so long as the}; mass of metal left is largeenough by its inertia and cohesion to enable it to resist toogreat metalin the head, as an entirety, to flow, by heavy draft, with that in theweb whose flow has been thus equalized.

In the finishing-passes, Nos. 9 to 14, the web is gradually anduniformly reduced and the acted on to form the beveled foot in theintermediate passes, and heavy draft on the under part of the shouldersof the head in the earlier of the finishingpasses, together withlighteni ing of draft at the extreme beveled end. The provisions thusmade permit of great nicety of adjustment or flow of metal between theleading pass No, 13 and the final finishing-pass No. 14.

Having thus fully described my said improvement in rolls, as of myinvention I claim- A set of rolls for rolling girder-rails devoid oflower flanges, provided with passes of the respective shapes shown inthe accompanying drawings, and therein numbered from l to 14, inclusive,substantially as described, for the purposes set forth.

ARTHUR J, MOXHAM.

\Vitnesses:

W. E. HOOPES, R. E. GLASS.

